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The influence of patient size on patient doses in cardiology

C J Kotre1, J Reay, C-L Chapple

  • 1Regional Medical Physics Department, Newcastle General Hospital, Newcastle-upon-Tyne NE4 6BE, UK. John.Kotre@nuth.northy.nhs.uk

Radiation Protection Dosimetry
|February 8, 2006
PubMed

Insights

A new size correction method for cardiology patient dose-area product (DAP) records significantly reduces variations unrelated to patient size. This allows for more accurate radiation dose assessments across all patient sizes, improving diagnostic reference levels.

Area of Science:

  • Medical Physics
  • Radiology
  • Cardiology

Background:

  • Patient radiation dose in cardiology and interventional radiology varies significantly due to procedure complexity and patient size.
  • This variation can mask the impact of patient size on radiation dose measurements like dose-area product (DAP).

Purpose of the Study:

  • To investigate the effectiveness of a previously defined size correction method on cardiology patient dose-area product (DAP) records.
  • To determine if this correction can reduce the correlation between DAP and patient weight.

Main Methods:

  • Applied an experimentally derived size correction factor to cardiology patient DAP records.
  • The correction converts DAP to a value expected for a patient similar in size to ICRP Reference Man, based on patient diameter-DAP relationships.

Main Results:

  • The size correction method was found to significantly reduce the residual correlation between DAP and patient weight.
  • This indicates that the correction effectively accounts for variations in patient size.

Conclusions:

  • Size correction is a valuable tool for standardizing patient radiation dose data in cardiology.
  • This method enables diagnostic reference levels to be set using data from all patients, not just 'standard-sized' ones.

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